Table 2 The efficacy of VNS
3 months | 6 months | 1 year | 3 years | 4 years | |
|---|---|---|---|---|---|
Number of patients | 86 | 85 | 84 | 76 | 76 |
McHugh I n (%) | 7 (8.1) | 10 (11.8) | 9 (10.7) | 18 (23.7) | 16 (21.1) |
McHugh II n (%) | 12 (14.0) | 24 (28.2) | 38 (45.2) | 30 (39.5) | 36 (47.4) |
McHugh III n (%) | 34 (39.5) | 26 (30.6) | 23 (27.4) | 17 (22.4) | 9 (11.8) |
McHugh IV n (%) | 1 (1.2) | 0 (0) | 2 (2.4) | 4 (5.3) | 5 (6.6) |
McHugh V n (%) | 32 (38.4) | 25 (29.4) | 12 (16.7) | 7 (14.5) | 10 (19.7) |
Missing value (n) | 0 | 1 | 2 | 10 | 10 |